Sink attachment



FIG. 1 is a perspective view of the sink attachment showing my new design.

FIG. 2 is a front view thereof.

FIG. 3 is a back view thereof.

FIG. 4 is a side view thereof.

FIG. 5 is another side view thereof.

FIG. 6 is a top view thereof.

FIG. 7 is a bottom view thereof; and,

FIG. 8 is an exploded perspective view thereof.

The broken lines in the drawings illustrate portions of the sink attachment which form no part of the claimed design. 

CLAIM The ornamental design for a sink attachment, as shown and described. 